I have been a devotee of the opaque Sinner Red since it's debut. I have yet to find a comparable product that offers the saturation of color and rich texture. If you prefer a lighter look on your lips you can try the Saints collection. How beautiful is the packaging? Stunner.
The difference? The Saints are sheer and have only 10% pigment in them to give you a hint of the color whereas the Sinners are 90% pigment and opaque in texture.
Although she sells them directly through her website they are frequently sold out. I recommend picking them up in store or online at Barneys New York.